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i386: check cpl in verr and verw

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This commit is contained in:
cracyc 2025-05-20 18:52:27 -05:00
parent 675ed2356a
commit eb6fa6f6dc
3 changed files with 17 additions and 10 deletions
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1
src/devices/cpu/i386/i386.h
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@ -15,6 +15,7 @@
#include "divtlb.h" #include "divtlb.h"
#include "i386dasm.h" #include "i386dasm.h"
#include <algorithm>
#define INPUT_LINE_A20 1 #define INPUT_LINE_A20 1
#define INPUT_LINE_SMI 2 #define INPUT_LINE_SMI 2

13
src/devices/cpu/i386/i386op16.hxx
View File

@ -3260,14 +3260,18 @@ void i386_device::i386_group0F00_16() // Opcode 0x0f 00
{ // check if conforming, these are always readable, regardless of privilege { // check if conforming, these are always readable, regardless of privilege
if(!(seg.flags & 0x04)) if(!(seg.flags & 0x04))
{ {
// if not conforming, then we must check privilege levels (TODO: current privilege level check) // if not conforming, then we must check privilege levels
if(((seg.flags >> 5) & 0x03) < (address & 0x03)) if(((seg.flags >> 5) & 0x03) < std::max(m_CPL, (uint8_t)(address & 0x03)))
result = 0; result = 0;
} }
} }
} }
else
{
if(((seg.flags >> 5) & 0x03) < std::max(m_CPL, (uint8_t)(address & 0x03)))
result = 0;
}
} }
// check that the descriptor privilege is greater or equal to the selector's privilege level and the current privilege (TODO)
SetZF(result); SetZF(result);
} }
else else
@ -3308,8 +3312,7 @@ void i386_device::i386_group0F00_16() // Opcode 0x0f 00
result = 0; result = 0;
} }
} }
// check that the descriptor privilege is greater or equal to the selector's privilege level and the current privilege (TODO) if(((seg.flags >> 5) & 0x03) < std::max(m_CPL, (uint8_t)(address & 0x03)))
if(((seg.flags >> 5) & 0x03) < (address & 0x03))
result = 0; result = 0;
SetZF(result); SetZF(result);
} }

13
src/devices/cpu/i386/i386op32.hxx
View File

@ -3061,14 +3061,18 @@ void i386_device::i386_group0F00_32() // Opcode 0x0f 00
{ // check if conforming, these are always readable, regardless of privilege { // check if conforming, these are always readable, regardless of privilege
if(!(seg.flags & 0x04)) if(!(seg.flags & 0x04))
{ {
// if not conforming, then we must check privilege levels (TODO: current privilege level check) // if not conforming, then we must check privilege levels
if(((seg.flags >> 5) & 0x03) < (address & 0x03)) if(((seg.flags >> 5) & 0x03) < std::max(m_CPL, (uint8_t)(address & 0x03)))
result = 0; result = 0;
} }
} }
} }
else
{
if(((seg.flags >> 5) & 0x03) < std::max(m_CPL, (uint8_t)(address & 0x03)))
result = 0;
}
} }
// check that the descriptor privilege is greater or equal to the selector's privilege level and the current privilege (TODO)
SetZF(result); SetZF(result);
} }
else else
@ -3108,8 +3112,7 @@ void i386_device::i386_group0F00_32() // Opcode 0x0f 00
result = 0; result = 0;
} }
} }
// check that the descriptor privilege is greater or equal to the selector's privilege level and the current privilege (TODO) if(((seg.flags >> 5) & 0x03) < std::max(m_CPL, (uint8_t)(address & 0x03)))
if(((seg.flags >> 5) & 0x03) < (address & 0x03))
result = 0; result = 0;
SetZF(result); SetZF(result);
} }